The Patriot Ordnance MMR M-rail is an excellent choice if you want to upgrade your older, heavier POF rifle. This lightweight, free floating rail system attaches to POF uppers, and includes three aluminum picatinny rail sections that can be screwed to the top, bottom, and sides of the handguard. This allows you to keep your handguard slim and lightweight, or you can customize the sections on your handguard for any additional accessories.